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Beanium Isotope LAB

Total questions: 14

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

Determine the average mass of each Bg isotope.

4 lines
2.

What is the total number of Bg atoms in the original sample?

4 lines
3.

Calculate the percent abundance of each isotope: divide the number of atoms of each isotope by the total number of atoms, and multiply the result by 100.

4 lines
4.

The atomic mass of Bg is a weighted average of the masses of the isotopes. The weighting factors are their relative abundances. Use the following equation to calculate the average atomic mass of Bg using isotopic composition. Hint: Divide the percent abundance of each isotope by 100 to obtain its relative abundance.

4 lines
5.

Describe the structure of atoms, including the masses and locations of protons and neutrons in the atom.

4 lines
6.

Identify advantages and limitations of the bean model, such as size, scale, properties, and materials.

4 lines
7.
An element with 4.35% have a mass of 49.9461 amu, 83.79% have amass of 51.9405 amu, 9.50% have a mass of 52.9407 amu, and 2.36% have a mass of 53.9389amu.
a)
51.99 amu
b)
52.19 amu
c)
53.45 amu
d)
17.33 amu
8.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
How many protons does this element have?
a)
32
b)
33
c)
34
d)
no way to know
9.
4.35% of all X atoms have a mass of 39.946 amu. 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu. What is the average atomic mass of atom X?
a)
41.97 amu
b)
42.19 amu
c)
10.43 amu
d)
40.04 amu
10.

Determine the average atomic mass for the beanium atom if a sample has 7 red beans and a mass of 10.2 g, 13 black beans with a mass of 7.6 g, and 22 white beans with a mass of 23 g.

a)

0.97 amu

b)

1.93 amu

c)

3.5 amu

d)

2.0 amu

11.
How many neutrons does uranium-235 have?
a)
238
b)
92
c)
146
d)
143
12.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
13.

There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope 65Cu composes 69.2% of the sample and 63Cu comprises the other 30.8%. Based on this data, what is the atomic mass of copper?

a)

29 amu

b)

63.546 amu

c)

64.4 amu

d)

63.6 amu

14.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass